Gas heating stove



April 1932- E. c. MERRILL ,855,980

GAS HEATING STOVE Filed April 3, 1931 2 Sheets-Sheet 2 O O 0 0 O O O O O O a I40 20 f 47 26 52 $&

gwuentoz EGJ/"errill Patented Apr. 26, 1932 UNITED STATES PATENT OFFICE EDWIN O. MERRILL, OF IPITTSBURGH, PENNSYLVANIA GAS HEATING STOVE Application filed. April 3, 1931. Serial No. 527,548.

ranged as to provide, when used, for satisfactorily heating a room in which the stove is placed.

A further object of the invention is to provide, in a manner as hereinafter set forth, a stove of the class referred to so constructed and arranged to provide for the circulation of air therethrough, the discharge of heated air therefrom and further project ng heat therefrom below the point of discharge of the heated air resulting thereby in the thoroughly efiicient heating of a'room when the stove is active in the latter.

Further objects of the invention are to provide, in a manner as hereinafter set forth, a stove of the class referred to which is simple in its construction and arrangement, strong, durable, compact, thoroughly efficient in use for the purpose for which it is intended, readily assembled and comparatively inexpensive to set up.

With the foregoing and other objects in view, the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specifically described, and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which fall within the scope of the claims hereunto appended. V

In the drawings wherein like reference characters denote corresponding parts throughout the several views Figure 1 is vertical sectional view of a gas heating stove in accordance with this invention.

Figure 2 is a front elevation thereof. 7

Figure 3 is a section on line S3 Figure 1.

The stove includes a pair of spaced. parallel base members and as they are of like construction, but one will be described. as the description of one will apply to the other. Each base member is formed from a metallic strap of the desired width, length and gauge and bent to provide a bottom part 1, a top'part 2 of less length than the latter, a rear part 3 integral with bottom par 1 and top part 2, and a front part/1 depending at an outward inclination from top part 2 and terminating in a forwardly directed flange 5 which opposes the outer end of bottom part 1.

Mounted upon the base members is a bottom plate 6 having a vertically disposed depending endless flange 7. A part of flange 7 abuts the upper portion of the rear part 3 of the base members. Parts of flange 7 oppose the outer side edges of the base members and a part of flange 7 is spaced from the forward end of the part 2 and depends towards the 7 part 4 of the base members. The plate 6 is fixedly secured to the base members by holdfast devices8. The plate6 at the back thereof is formed with spaced slots and the material freed by the slots is vertically disposed to form a pair of spaced vertically extending flanges 8 and a pair of lengthwise extending rectangular slots 9 arranged in endwise opposed spacedrelation. The slots 9 constitute air intakes. The plate 6 is also formed with an opening lO for a purpose to be presently referred to.

Mounted upon the plate 6 as well as being secured thereto is an upstanding open front casing. The plate 6 forms the bottom of the I casing. V

The casing includes a back section 11 in the form of a vertically disposed wall, a top sec.- tion 12 including avertically disposed rear portion 13, an. arcuate top portion 14, a curved front portion 15 and a flat lower portion 16, .and a pair of oppositely disposed side sections 17 each consisting of a vertically disposed wall forming portion 18, an out wardly inclined Wall forming portion 19 and a vertically disposed outer portion 20 of circular cross section.

The wall forming portions 18 terminate in the wall forming portion provided by the rear section 11 of the casing. The portion 13 of the top section 12 has its lower part adjacent the upper part of the rear or back section 11 of the casing and opposed parts of the sections 11 and 12 are suitably secured together. The section 11 as well as the section 12 have co-related cutout parts 21 to proopenings 25, 26 for the discharge of the heat ed air from the chamber 24. The lower portion 16 is of a length greater than the width of section 11 and the side edges of portion 16 align with the side edges of plate 6. The section 12- is closed at each side. The lower portion 16 of section 12 seats upon the wall forming portions 18, 19 and circular outer portion 20 of each of the side sections 17 of the casing.

The section 11 is secured to the flanges 8 by holdfast devices 27. Tie rods 28, 29 are employed for coupling section 12 to plate 6 whereby the side sections 17 are clamped between section 12 and plate 6.

The stove includes a front piece 30 which at its top is extended to oppose the rear of the front part of flange 7, as at 31 and its bottom is extended between the flange 5 and bottom part 1 of the base members as at 32. The front piece 30 is secured to the base members by holdfast devices 33.

Suspended within the casing between the side sections 17 is a partition member 34 which inclines forwardly from its bottom towards its top. Depending from the lower portion 16 of section 12 is a hanger member 35 having a hook shaped lower end 36 for extension into a groove 37 formed at the upper end of the partition 34 for the purpose of suspending the latter. The forward face of partition 34 has projecting therefrom a hook 37 which engages under the inturned upper portion 38 of a support 39 which'inclines forwardly from its bottom towards its top. The interengaging of the hook 37 with the inturned portion 38 of the support 39 couples the partition 34 to the support or plate 39. The lower end of support 39 has a rearwardly directed flange 40 which is fixedly secured by the holdfast device 41 to the upper face of plate 6 slightly in advance of the slots 9. The lower end of partition 34 is formed with a forwardly directly downwardly inclined flange 42 which extends towards the support 39- The lower end of partition 34 is spaced above the plate 6. The partition 34, in connection with the support 39 provides a cool air intake compartment 43 which opens into the chamber 24. The partition 34 in connection with the support 39 also forms a conducting passage 44 for a portion of the air which enters the compartment 43. The channel 44 conducts the air to the heat proj ectors to be presently referred to. The flange 42 is spaced from the support 39 and in connection with the latter provides an intake 45 for the passage 44. The intake 45 is adjusta ble and for such purposes the support 38 carries an adjusting screw 46 for engagement with the lower portion of the partition 34 to swing the latter rearwardly from support 39 to increase the width of the intake 45. The lower portion of the partition 34 is resilient and tends to move towards support 39 but such movement is arrested by the adjusting screw 46. Any number of adjusting screws can be employed.

Positioned forwardly of the support 39 in proximity to the top thereof is a pair of coiled, interengaging heat radiating elements 47,48 constructed of highly refractory material. The elements 47, 48 are maintained in interengaged relation by a bar 49 which is interposed between the lower portion of one and the upper portion of the other elements 47, 48. Carried by the support 39 are superposed yokes '50 which extend into the exhaust flue 52 for the products of combustion and which opens into a chamber 53 provided by a wall forming member 54 which is secured to the lower portion 16 of the section 12 of the casing and also to the hanger Arranged within the chamber 53 is a depending perforated deflector and which is arranged rearwardly with respect to hanger 35. The outlets 22 and 23 open into the chamber 53. Carried by the lower portion 16 of the section 12 of the casing is a depending confining member 56 which is arranged forward- 1y of the outlet 23' and tends to direct the products of combustion to confine them in a manner so that they will enter the outlets 22, 23 and pass into the chamber 53 and from there discharged into the flue 52.

Extending through the opening 10 is an upstanding tubular member 57 opening at its upper end into a burner 54, the latter being provided with rearwardly inclined jet openings 55 in the top thereof and arranged in close proximity to the element 48. Connected to the tubular member 57 is a supply pipe 56, Figure 2.

Positioned forwardly with respect to the burner 54 is a baffle 57 having its lower end formed with a rearwardly directed flange 58 carrying vertically disposed spaced supports 59 therefor. The supports 59 are positioned on the plate 6 and maintain the flange 58 thereabove to provide an air intake 60. The bafile 57 at its upper portion is curved rearwardly as at 61 and overlaps the forward part of the top of the burner 54. The portion 61 of the bafiie 57 is maintained in spaced relation with respect to the burner 54 by spacing means 62. The top of the baffle extends in proximity to the element 48. The baffle hides the burner and directs the air about the burner to the flame. The direction of the travel of the air about the burner towards the flame is indicated by arrows in Figure 1. The direction of the air passing through the compartment 43 is also indicated by arrows in Figure 1.

The air passing through the intakes 9 into the compartment 43 will be heated as it travels towards the chamber 24 and owing to the manner in which the air circulates through the stove, heated air will be discharged from the front of the upper section 12 of the open front casing. The heat will be projected from the elements 47, 48 into the room and will assist with the heated air discharged from the top of the casing to satisfactorily heat the room. The air passing up the passage 44 is discharged upon the elements 47, 48 and passes up into chamber 53 for exhaust.

The partition 34, support 39, a part of the lower portion 16 of section 12, a part of wall forming portions 18, a wall forming portion 19, hanger and plate 6 provides a fire box or burner chamber which opens at the front of the casing. T he passage 44 extends above the outlets 52 therefor. The partition 34, support 39 and hanger 35 provides the front wall, the plate 6 the bottom, and the wall forming portions 18, the sides of the cool air receiving compartment and the latter gradually increases in area from its lower to its upper end, due to the inclination of partition 34, support 39 and hanger 35. The cool air is taken in from below the plate 6 and at the rear and sides of the lower portion of the stove.

The connections indicated at 37, 38 between partition 34 and support 39 provides a fulcrum for the former. this arrangement, in connection with the adjusting screws 46, the partition can be shifted to move the upper portion of support 39 therewith to adjust the latter with respect to burner 54 whereby the position of the radiating elements may be changed relative to the burner.

The elements 47, 48 are formed of a mate rial which will become incandescent and the light rays will be radiated therefrom into the room providing a source of heat.

- lVhat I claim is 1. In a gas heating stove, a burner, a pair of superposed heat radiating elements arranged thereover and in close proximity to the burner, and a pair of opposed spaced upstanding plates, one'positioned forwardly of and coacting with the other to provide an air conducting passage closed at its upper end and extending above said radiating elements, the said forward element having outlets arranged below the closed end of said passage for discharging air against said heat radiating elements, said burner and radiating elements arranged forwardly of said forward element.

2. In a gas heating stove, a burner, a pair of superposed heat radiating elements arranged thereover and in close proximity to the burner, apair of opposed spaced upstanding plates, one positioned forwardly of and coacting with the other to provide an air conducting passage closed at its upper end and extending above said radiating elements, the said forward element having outlets arranged below the closed end of said passage for discharging air against said heat radiating elements, said burner and radiating elements arranged forwardly of said forward element, and each of said radiating elements consisting of a closed coiled tubular body of-refractory material, said radiating elements extending into each other.

3. In a gas heating stove, a burner, a pair of superposed heat radiating elements arranged thereover and in close proximity to the burner, a pair of opposed spaced upstanding plates, one positioned forwardly of and coacting with the other to provide an air conducting passage closed at its upper end and extending above said radiating elements, the said forward element having outlets arranged below the closed end of said passage for discharging air against said heat radiating elements, said burner and radiating elements arranged forwardly of said forward element, each of said radiating elements consisting of a closed coiled tubular body of refractory material, said radiating elements extending into each other, and means extending through the lower portion of one and the upper portion of the other of said heat radiating elements to prevent the separation of one relative to the other. I

4. In a gas heating stove, a burner, a pair of superposed heat radiating elements arranged thereover and in close proximity to the burner, a pair of opposed spaced upstanding plates, one positioned forwardly of and coacting with the other to provide an air conducting passage closed at its upper end and extending above said radiating elements, the said forward element having outlets arranged below the closed end of said passage for discharging air against said heat radiating elements, said burner and radiating elements arranged forwardly of said forward element, and said upstanding elements having coacting means to provide an adjustable air intake at the lower end of said passage.

5. In a gas heating stove, a burner, a pair of superposed heatradiating elements arranged thereover and in close proximity to the burner, a pair of opposed spaced upstanding plates, one positioned forwardly of and coacting with the other to provide an air conducting passage closed at its upper end and extending above said radiating elements, the said forward element having outlets arranged below the closed end of said passage for dis charging air against said heat radiating elements, said burner and radiating elements ar ranged forwardly of said forward element, each of said radiating elements consisting of a closed coiled tubular body of refractory material, said radiating elements extending into each other, and said upstanding elements having coacting means to provide an adjustable air intake at the lower end of said passage.

6. In a gas heating stove, a burner, a pair of superposed heat radiating elements arranged thereover and inclose proximity to the burner, a pair of opposed spaced upstanding plates, one positioned forwardly of and coacting with the other to provide an air conducting passage closed at its upper end and extending above said radiating elements, the said forward element having outlets arranged below the closed end of said passage for discharging air against said heat radiating elements. said burner and radiating elements arranged forwardly of said forward element, each of said radiating elements consisting of aclosed coiled tubular body of ref 'actory material, said radiating elements extending into each other, means extending through the lower portion of one and the upper portion of the other of said heat radiating elements to prevent the separation of one relative to the other, and said upstanding elements having coacting means to provide an adjustable air intake at the lower end of said passage.

7. In a gas heating stove, a burner, a pair of superposed heat radiating elements arranged thereover and in close proximity to the burner, a pair of opposed spaced upstanding plates, one positioned forwardly of and coacting with the other to provide an air conducting passage closed at its upper end and extending above said radiating elements, the said forward element having outlets arranged below the closed end of said passage for discharging air against said heat radiating elements. said burner and radiating elements arranged forwardly of said forward element, and means for connecting said heat projecting elements tothe said forward upstanding element.

8. In a gas heating stove, a burner, a pair of superposed heat radiating elements arranged thereover and in close proximity to the burner, pair of opposed spaced upstanding plates, one positioned forwardly of and coacting with the other to provide an air conducting passage closed at its upper end and extending above said radiating elements, the said forward element having outlets arranged below the closed end of said passage for discharging air against said heat radiating elements, said burner and radiating elements arranged forwardly of said forward element, said upstanding elements having coacting means to provide an adjustable air intake at the lower end of said passage, and means for connecting said heat radiating elements to the said forward upstanding element.

9. A ieating stove comprising an open front casing having means to provide a hot air receiving chamber at its top, a cool air receiving compartment at its rear opening at its upper end into said hot air receiving cham her, an air conducting passage leading from said cool air receiving chamber and outlets above the bot-tom of said compartment for discharging air from said passage through 'the front wall of said compartment, heat radiants supported from the outer face of said front wall above and below said outlets, a burner positioned below said radiants, said chamber having outlets at its front and said compartment having intakes at its bottom.

10. A gas heating stove comprising an open front casing having means to provide a hot air receiving chamber at its top, a cool air receiving compartment at its rear opening at its upper end into said hot air receiving chamber, an air conducting passage leading from said cool air receiving chamber and outlets above the bottom of said compartment for discharging air from said passage through the front wall of said compartment, heat ra diants supported from the outer face of said front wall above and below said outlets, a burner positioned below said radiants, said chamber having outlets at its front and said compartment having intakes at its bottom, and a baffle forwardly of and spaced from said burner and forming in connection with the bottom of the casing air intake means forwardly and independent of said compartment.

11. A gas heating stove comprising an open front casing having means to provide a hot air receiving chamber at its top, a cool air receiving compartment at its rear opening at its upper end into said hot air receiving chamber, an air conducting passage lead ing from said cool air receiving chamber and outlets above the bottom of said compartment for discharging air from said passage through the front wall of said compartment, heat radiants supported from the outer face of said front wall above and below said outlets, a burner positioned below said radiants, said chamber having outlets at its front and said compartment having intakes at its bottom, and means for discharging the products of combustion, said means being arranged in, extended from and closed to said chamher and compartment and opening into the casing above and forwardly of said front Wall.

12. A gas heating stove comprising an open front casing having means to provide a hot air receiving chamber at its top, a cool air receiving compartment at its rear opening at its upper end into said hot air receiving chamber, an air conducting passage leading from said cool air receiving chamber and outlets above the bottom of said compartment for discharging air from said passage through the front wall of said compartment, heat radiants supported from the outer face of said front wall above and below said outlets, a burner positioned below said radiants, said chamber having outlets at its front and said compartment having intakes at its bottom, a baffle forwardly of and spaced from said burner and forming in connection with the bottom of the casing air intake means forwardly and independent of said compartment, and means for discharging the products of combustion, said means being arranged in, extended from and closed to said chamber and compartment and opening into the casing above and forwardly of said front wall.

13. In a gas burning stove, including an open front chamber, a burner arranged in the lower portion thereof, superposed heat radiants arranged above and in close proximity to the burner, means rearwardly of the burner for supplying air to said radiants, and an upstanding baflie arranged forwardly of, extending over the front of the top of and spaced from the burner, said baffle having means at its lower end coacting with the bottom of the chamber to provide an air intake.

14. In a gas burning stove, including an open front chamber, a burner arranged in the lower portion thereof, superposed heat radiants arranged above and in close proximity to the burner, means rearwardly of the burner for supplying air to said radiants, an upstanding baflie arranged forwardly of, extending over the front of the top of and spaced from the burner, said baflie having means at its lower end coacting with the bottom of the chamber to provide an air intake, and means for adjusting the supply of air to said radiants.

In testimony whereof, I affix my signature hereto.

EDWIN C. MERRILL. 

